反应详情

温度

120 °C

HxNB (8.94 g, 0.05 mol), diPhNB (16.1 g, 0.05 mol), 1-hexene (4.2 g, 0.05 mol) and toluene (142.0 g) were combined in a 250 mL serum bottle and heated to 120° C. in an oil bath to form a solution. To this solution were added [Pd(PCy3)2(O2CCH3)(NCCH3)]tetrakis(pentafluorophenyl)borate (Pd1446) (5.8E-3 g, 4.0E-6 mol) and N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate (DANFABA) (3.2E-3 g, 4.0E-6 mol), each in the form of a concentrated dichloromethane solution. After addition, the resulting mixture was maintained at 120° C. for 6 hours. The copolymer was precipitated by adding methanol drop wise into the vigorously stirred reaction mixture. The precipitated copolymer was collected by filtration and dried in an oven at 80° C. under vacuum. After drying, 12.0 g was obtained (48%). The molecular weight of the copolymer was determined by GPC in THF solvent (polystyrene standard) to be Mw=16,196 and Mn=8,448. The composition of the copolymer was determined by 1H-NMR to be 54/46 HxNB/diPhNB. The refractive indices of this polymer were measured by prism coupling method and determined to be 1.5569 in TE mode and 1.5555 in TM mode at a wavelength of 633 nm. The dried copolymer was dissolved in sufficient mesitylene to result in a 10 wt % copolymer solution.

1. customto form a solution
2. additionAfter addition
3. temperaturethe resulting mixture was maintained at 120° C. for 6 hours
4. customThe copolymer was precipitated
5. additionby adding methanol
6. customdrop wise into the vigorously stirred reaction mixture
7. filtrationThe precipitated copolymer was collected by filtration
8. customdried in an oven at 80° C. under vacuum
9. customAfter drying
10. custom12.0 g was obtained (48%)
11. customto result in a 10 wt % copolymer solution